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| Optimization of construction logistics organization for multi-section service tunnels in ultra-deep shafts |
| LIU Jianbin1, YANG Zhiyong1, RAO Li2*, WANG Shuying2, FANG Kejun1, WANG Zhuo3, YANG Zebin2
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1. Yungui Railway Yunnan Co., Ltd., Kunming 650500, Yunnan, China;
2. School of Civil Engineering, Central South University, Changsha 410075, Hunan, China;
3. China Railway Tunnel Group Co., Ltd., Guangzhou 511458, Guangdong, China |
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Abstract The multi-section excavation of the ultra-deep shaft service tunnel in Gaoligong Mountain was used as the engineering background, and the optimization of the shaft bottom yard, underground logistics organization, and vertical shaft transportation system was conducted based on the results of SUMO microscopic traffic numerical simulation software. The research results showed that rail transport at the shaft bottom was replaced with non-rail transport, which increased the shaft's mucking capacity to 1 000 m3/d, representing a 25% improvement. The layout of the shaft bottom yard, cross-sectional dimensions, and chamber configuration were optimized, which significantly enhanced transportation efficiency and reduced costs. Numerical simulation results of underground logistics organization showed that the average operating speed of muck transport vehicles was 74% of the maximum design speed. When the distance between the face and the shaft bottom yard was increased to 500 m and a cross-passage was added, no traffic conflict points were observed; however, when the vehicle spacing was too close, there was a risk of congestion. The vertical shaft transportation system was upgraded by modifying the hoisting systems in both the main and secondary shafts. The hoisting equipment was selected, and safety verification was performed, with corresponding safety control measures proposed.
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Received: 21 October 2024
Published: 08 January 2025
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